Qualitative and Quantitative Analysis of Polycyclic Aromatic Hydrocarbons in Diesel Oil by Comprehensive Two- Dimensional Gas Chromatography Combined with Hydrogen Flame Ionization Detector

A method for the qualitative and quantitative analysis of polycyclic aromatic hydrocarbons in diesel oil by comprehensive two-dimensional gas chromatography combined with hydrogen flame ionization detector (GC×GC-FID) was proposed. Four group-types of aromatic hydrocarbons in diesel oil were determined by comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC×GC-TOF MS), which were non-aromatic hydrocarbons, monocyclic aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic⁺ aromatic hydrocarbons, and 37 qualitative compounds were obtained, in which polycyclic aromatic hydrocarbons were quantified by peak area normalization method. It was shown that the absolute value of relative error of polycyclic aromatic hydrocarbons in the diesel oil quality control sample was not greater than 5.0%. Test for recovery was made on diesel oil sample by standard addition method, giving results in the range of 95.7%-104%, and RSDs (n=6) of the determined values ranged from 1.7% to 4.3%. The method was applied to analyze 7 real diesel oil samples and compared with NB/SH/T 0806-2022, it was shown that the absolute values of relative errors of the determined values obtained by two methods were less than 5.0%.